TY - RPRT TI - Planetary Gearbox Fault Detection Using Vibration Separation Techniques AU - Lewicki, David G. AU - LaBerge, Kelsen E. AU - Ehinger, Ryan T. AU - Fetty, Jason PY - 2011 UR - https://ntrs.nasa.gov/citations/20110023759 ID - 20110023759 ER -